package com.heima.filter;

import com.heima.utils.AppJwtUtil;
import io.jsonwebtoken.Claims;
import lombok.extern.slf4j.Slf4j;
import org.springframework.cloud.gateway.filter.GatewayFilterChain;
import org.springframework.cloud.gateway.filter.GlobalFilter;
import org.springframework.core.Ordered;
import org.springframework.http.HttpStatus;
import org.springframework.http.server.reactive.ServerHttpRequest;
import org.springframework.http.server.reactive.ServerHttpResponse;
import org.springframework.stereotype.Service;
import org.springframework.util.StringUtils;
import org.springframework.web.server.ServerWebExchange;
import reactor.core.publisher.Mono;

@Service
@Slf4j
public class AuthFilter implements GlobalFilter, Ordered {
    @Override
    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
        ServerHttpRequest request = exchange.getRequest();
        ServerHttpResponse response = exchange.getResponse();
        String path = request.getURI().getPath();
        if(path.contains("/login"))
           return chain.filter(exchange);

        String token = request.getHeaders().getFirst("token");
        if(!StringUtils.isEmpty(token)){
            Claims claims = AppJwtUtil.getClaimsBody(token);
            int status = AppJwtUtil.verifyToken(claims);
            if (status == -1 || status == 0)
            {
                Object userId =  claims.get("userId");
                Object name =  claims.get("name");
                if(userId!=null)
                {
                    request.mutate().header("userId",userId.toString());
                }
                if(name!=null)
                    request.mutate().header("name",name.toString());
                return chain.filter(exchange);
            }
        }
        response.setStatusCode(HttpStatus.UNAUTHORIZED);
        return response.setComplete();
    }

    @Override
    public int getOrder() {
        return 0;
    }
}
